白家包滑坡变形机制的模型试验研究

Model Test Study on Deformation Mechanism of Baijiabao Landslide

为研究白家包滑坡变形机制及变形趋势,采用模型试验方法模拟了降雨和水库水位综合作用下的滑坡变形规律,通过倾斜加载方式分析了滑坡可能失稳破坏形式,获取了滑坡失稳后的运动特征。结果表明,滑坡在水位骤降下变形显著,前缘先于后缘,滑速较快,入江方量大,失稳后具备致灾动力条件。

To study deformation mechanism and deformation tendency of Baijiabao landslide, the model test is used to simulate deformation rules of Baijiabao landslide under combined action of rainfall and reservoir level. And the possible unstable failure feature of the landslide can be analyzed by inclining-load method. Then the motion feature after instability landslide is obtained. The results show that the deformation of the landslide is obvious in the condition of rapid draw- down; the leading edge is antecedent to the trailing edge; the slip velocity is more quickly; the volume of the landslide slip into the Yangtze River is large. After losing stability, the landslide has the dynamic conditions to be disaster.